import { asyncRoutes, constantRoutes } from '@/router'
import { getMenuRouterData } from '@/api/dept'
import { getToken } from '@/utils/auth'
import dept from '@/views/system/dept/dept'
import Layout from '@/layout'
import XEUtils from 'xe-utils'
/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * 后台查询的菜单数据拼装成路由格式的数据
 * @param routes
 */
export function generaMenu(routes, data) {
  data.forEach(item => {
    const menu = {
      path: item.path,
      component: item.parent === ''||item.parent ==null ? Layout : (resolve) => require([`@/views${item.path}/${item.component}`],resolve),
      hidden: !item.hidden,
      cache:item.nocache,
      children: [],
      name: item.component,
      meta: { title: item.name, icon:item.icon, id: item.id }
    }
    if (item.children) {
      generaMenu(menu.children, item.children)
    }
    routes.push(menu)
  })
}
/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */

export function filterAsyncRoutes(routes, roles) {
  const res = []
  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })
  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}
const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      // 先查询后台并返回左侧菜单数据并把数据添加到路由
      getMenuRouterData().then(response => {
        const loadMenuData = []
        if (response.code !==2000) {
          this.$message({
            message: '菜单数据加载异常',
            type: 'error'
          })
        } else {
          sessionStorage.setItem('menuData', JSON.stringify(response.data.data)) /*这里存该用户拥有的菜单数据*/ 
          const dataTree = XEUtils.toArrayTree(response.data.data,{ parentKey: 'parent', strict: true })
          Object.assign(loadMenuData,dataTree)
          generaMenu(asyncRoutes, loadMenuData)
          let accessedRoutes
          if (roles.includes('admin')) {
            // alert(JSON.stringify(asyncRoutes))
            accessedRoutes = asyncRoutes || []
          } else {
            accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
          }
          commit('SET_ROUTES', accessedRoutes)
          resolve(accessedRoutes)
        }
        // generaMenu(asyncRoutes, data)
      }).catch(error => {
        console.log(error)
      })
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
